Radiant energy – Invisible radiant energy responsive electric signalling – Ultraviolet light responsive means
Patent
1980-12-12
1982-09-21
Smith, Alfred E.
Radiant energy
Invisible radiant energy responsive electric signalling
Ultraviolet light responsive means
250361C, 422 68, G01J 142, G01T 120, F01C 300
Patent
active
043508901
ABSTRACT:
A device for monitoring low levels of light emission in a selected underwr environment is provided with a photodetector having a light sensitive surface oriented into the environment, the photodetector generating electrical signals which are representative of light impinging upon the light sensitive surface. A window is positioned between the light sensitive surface and the underwater environment to protect the photodetector from the underwater environment, and a first material is positioned between the window and the underwater environment to prevent biological growth upon the window. A second material is placed in cooperative relationship with the first material to shift the wavelengths of certain light photons occurring in the underwater environment from a first wavelength range to a second wavelength range, in order to increase the attenuation lengths of the photons before they pass through the window.
REFERENCES:
patent: 2616334 (1952-11-01), Zernike
patent: 4139515 (1979-02-01), Dennington
patent: 4191579 (1980-03-01), Hails et al.
Dooley Carol A.
Geelhood Bruce D.
Lane Sandra M.
Lindner Elek
Mastny Gary F.
Beers Robert F.
Howell Janice A.
Johnston Ervin F.
Skarsten James O.
Smith Alfred E.
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